{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "If fish occupying low trophic levels are capable of surviving with high Hg body burdens , this tolerance has important implications for Hg exposure of organisms occupying higher trophic levels ."}
{"Chemical": ["Hg"]}